CN112904431A - Method, device and system for detecting non-induction plate area of vehicle of linear motor traction system and medium - Google Patents
Method, device and system for detecting non-induction plate area of vehicle of linear motor traction system and medium Download PDFInfo
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- CN112904431A CN112904431A CN201911134070.5A CN201911134070A CN112904431A CN 112904431 A CN112904431 A CN 112904431A CN 201911134070 A CN201911134070 A CN 201911134070A CN 112904431 A CN112904431 A CN 112904431A
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
- G01V3/04—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current using dc
Abstract
The invention discloses a method, a device, a system, a medium and equipment for detecting a non-induction plate area of a vehicle of a linear motor traction system, which specifically comprise the following steps: s01, acquiring intermediate direct current in a traction system of the direct current motor; and S02, comparing the intermediate direct current obtained in the step S01 with a preset standard current, and judging whether the vehicle enters the no-induction-board area or not according to the comparison result. The method, the device, the system, the medium and the equipment for detecting the non-induction plate area of the linear motor traction system vehicle have the advantages of simplicity and convenience in operation, low cost, good real-time performance, high precision and the like.
Description
Technical Field
The invention mainly relates to the technical field of rail transit, in particular to a method, a device, a system, a medium and equipment for detecting a non-induction plate area of a vehicle of a linear motor traction system.
Background
The linear induction motor traction system has the advantages of strong climbing capability, small turning radius, low manufacturing cost, good traction force exertion performance and the like, and is more and more widely applied in the field of rail transit. Due to the structural particularity of a linear motor traction system vehicle, the stator (primary) and the rotor (secondary) of the motor are separately installed. At present, a linear motor for city gauge field traction mostly adopts a short primary long secondary form, and a secondary of the linear motor is formed by an induction plate laid on a track. Due to the limited laying of the lines and the like, the situation of discontinuity of the induction board inevitably occurs in practical application, and a non-induction board area is formed. When the vehicle passes through the area without the induction plate, the stability of the vehicle operation is easily influenced due to the loss of the secondary of the linear motor, and even serious people can cause accidents such as parking rescue and the like. In the existing method, the rotor flux linkage of a traction system of a linear motor is observed, and whether an induction plate exists is judged according to the change of the rotor flux linkage. However, due to the particularity of the linear motor structure, the open motor structure affects the calculation accuracy of the magnetic linkage.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a method, a device, a system, a medium and equipment for detecting the non-induction plate area of a linear motor traction system vehicle, which are simple and convenient to operate, low in cost, good in real-time performance and high in precision.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a method for detecting a non-induction plate area of a linear motor traction system vehicle comprises the following steps:
s01, acquiring intermediate direct current in a traction system of the direct current motor;
and S02, comparing the intermediate direct current obtained in the step S01 with a preset standard current, and judging whether the vehicle enters the no-induction-board area or not according to the comparison result.
As a further improvement of the above technical solution, in step S02, when the preset standard current is greater than the intermediate dc current and the deviation between the preset standard current and the intermediate dc current is greater than a certain value, it is determined that the vehicle enters the no-induction zone.
As a further improvement of the above technical solution, in step S01, when the externally input grid voltage and the motor set torque are stabilized in a certain range, an intermediate direct current in the dc motor traction system is obtained.
The invention also discloses a detection device for the non-induction plate area of the vehicle of the direct current motor traction system, which comprises the following components:
the acquisition module is used for acquiring intermediate direct current in a traction system of the direct current motor;
and a judging module, configured to compare the intermediate direct current obtained in step S01 with a preset standard current, and judge whether the vehicle enters the no-induction-board area.
As a further improvement of the above technical solution, the acquisition module is a current sensor.
The invention further discloses a detection system for the non-induction plate area of the vehicle of the direct current motor traction system, which comprises the following components:
the first program module is used for acquiring intermediate direct current in a traction system of the direct current motor;
and a second program module, configured to compare the intermediate direct current obtained in step S01 with a preset standard current, and determine whether the vehicle enters the no-induction-board area.
The invention also discloses a computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, performs the steps of the method for detecting the sensorless zone of a linear motor traction system vehicle as described above.
The invention further discloses a computer device comprising a memory and a processor, the memory having stored thereon a computer program, characterized in that the computer program, when being executed by the processor, performs the steps of the method for detecting a sensorless zone of a linear motor traction system vehicle as described above.
Compared with the prior art, the invention has the advantages that:
according to the detection method, the device and the system for the non-induction plate area of the linear motor traction system vehicle, the running state of the motor and the input network voltage are observed in real time, when the network voltage input from the outside and the given torque do not change obviously, the input electric power and the output mechanical power of the linear motor traction system are approximately equal according to the law of energy conservation, and if the intermediate direct current is obviously reduced, the linear motor of the vehicle is judged to enter the non-induction plate area, so that the vehicle can conveniently and timely make corresponding control, and the stability of subsequent driving is guaranteed; the whole scheme does not need to add any hardware, and the cost is low; the result of whether the vehicle enters the non-induction plate can be obtained only by detecting the intermediate direct current and simply judging the intermediate direct current, the operation is simple and convenient, and the judgment is carried out through the current, so that the real-time performance is good and the precision is high; for the mode of judging through the magnetic linkage, judge through middle direct current, from the whole power change angle of motor, it is more direct effective and accurate.
Drawings
FIG. 1 is a flow chart of an embodiment of the method of the present invention.
FIG. 2 is a block diagram of an embodiment of the traction system of the present invention.
Detailed Description
The invention is further described below with reference to the figures and the specific embodiments of the description.
As shown in fig. 1 and fig. 2, the method for detecting the sensorless zone of the vehicle with the linear motor traction system of the embodiment includes the steps of:
s01, acquiring intermediate direct current in a traction system of the direct current motor;
and S02, comparing the intermediate direct current obtained in the step S01 with a preset standard current, and judging whether the vehicle enters the no-induction-board area or not according to the comparison result.
Specifically, in step S02, when the preset standard current is greater than the intermediate dc current and the deviation between the two is greater than a certain value, it is determined that the vehicle enters the no-induction zone. In addition, in step S01, when the externally input grid voltage and the motor set torque are stabilized within a certain range, the intermediate dc current in the dc motor traction system is obtained, so as to ensure the accuracy of the subsequent determination.
When the linear motor traction system passes through the area without the induction plate, the secondary (rotor) of the motor on the track is gradually reduced, so that the overall power of the motor is reduced, and the direct current is reflected most obviously in the middle, so that the linear motor traction system can be determined according to the change of the direct current in the middle when judging whether the linear motor enters the area without the induction plate. Specifically, by observing the running state of the motor in real time, when the network voltage input from the outside and the given torque do not change obviously, the input electric power and the output mechanical power of the linear motor traction system are approximately equal according to the law of energy conservation, and if the intermediate direct current is obviously reduced, the linear motor is judged to enter the area without the induction plate at the moment.
The invention detects in a mode of intermediate direct current, is a method extracted in practical application, and the conventional judgment whether to enter a zone without an induction plate starts from a motor body at present, but the invention starts from the whole linear induction motor traction control system and judges whether the induction plate of the motor is lost or not according to the detection of external current change. The whole scheme does not need to add any hardware, and is low in cost; according to the whole scheme, only the middle direct current needs to be detected, and whether the vehicle enters the non-induction plate or not can be obtained by simply judging the middle direct current, so that the operation is simple and convenient, the judgment is carried out through the current, the real-time performance is good, and the precision is high.
As shown in fig. 2, Ud is the input side intermediate dc voltage, Id is the intermediate dc current, and the linear induction motor generates corresponding torque T and speed N. According to the main circuit energy system, the power input at the dc side is equal to the power output by the linear induction motor, without considering losses, that is:
Ud*Id＝T*N/9550
when the linear motor traction system vehicle passes through the induction plate-free area, the actual output power of the motor is obviously reduced due to the loss of the induction plate. Considering that the time is short when the vehicle passes through the inductionless panel region in practical application, the torque T and the speed N output by the motor can be considered to be constant in the process, and the intermediate voltage on the direct current side is considered to be stable. At this time, the actual power of the motor is reduced due to the loss of the induction plate, and under the condition of inputting the same torque and speed, the power consumed by the motor is reduced, so that the reduction of the intermediate direct current is inevitably caused. Therefore, the linear motor passing through the induction plate-free area can be detected by detecting the change of the intermediate direct current.
The invention also discloses a detection device for the non-induction plate area of the vehicle of the direct current motor traction system, which comprises the following components:
the acquisition module is used for acquiring intermediate direct current in a traction system of the direct current motor;
and a judging module, configured to compare the intermediate direct current obtained in step S01 with a preset standard current, and judge whether the vehicle enters the no-induction-board area.
In this embodiment, the obtaining module is a current sensor, and the determining module may adopt a control unit in a linear motor traction system.
The invention further discloses a detection system for the non-induction plate area of the vehicle of the direct current motor traction system, which comprises the following components:
the first program module is used for acquiring intermediate direct current in a traction system of the direct current motor;
and a second program module, configured to compare the intermediate direct current obtained in step S01 with a preset standard current, and determine whether the vehicle enters the no-induction-board area.
The embodiment of the invention also discloses a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the computer program executes the steps of the method for detecting the non-induction board area of the linear motor traction system vehicle. Meanwhile, the embodiment of the invention also discloses computer equipment which comprises a processor and a memory, wherein the memory is stored with a computer program, and the computer program executes the steps of the method for detecting the non-induction board area of the linear motor traction system vehicle when being operated by the processor. All or part of the flow of the method of the embodiments may be implemented by a computer program, which may be stored in a computer-readable storage medium and executed by a processor, to implement the steps of the embodiments of the methods. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. The memory may be used to store computer programs and/or modules, and the processor may perform various functions by executing or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (8)
1. A method for detecting a non-induction plate area of a linear motor traction system vehicle is characterized by comprising the following steps:
s01, acquiring intermediate direct current in a traction system of the direct current motor;
and S02, comparing the intermediate direct current obtained in the step S01 with a preset standard current, and judging whether the vehicle enters the no-induction-board area or not according to the comparison result.
2. The method as claimed in claim 1, wherein in step S02, when the predetermined standard current is greater than the middle dc current and the deviation between the two is greater than a certain value, it is determined that the vehicle enters the no-induction-zone.
3. The method for detecting the sensorless zone of a dc motor traction system vehicle according to claim 1 or 2, wherein in step S01, when the externally inputted grid voltage and the motor set torque are stabilized within a certain range, the intermediate dc current in the dc motor traction system is obtained.
4. A detection device for a non-induction plate area of a vehicle of a direct current motor traction system is characterized by comprising:
the acquisition module is used for acquiring intermediate direct current in a traction system of the direct current motor;
and a judging module, configured to compare the intermediate direct current obtained in step S01 with a preset standard current, and judge whether the vehicle enters the no-induction-board area.
5. The device for detecting the sensorless zone of a dc motor traction system vehicle of claim 4 wherein the acquisition module is a current sensor.
6. A system for detecting a sensorless zone of a dc motor traction system vehicle, comprising:
the first program module is used for acquiring intermediate direct current in a traction system of the direct current motor;
and a second program module, configured to compare the intermediate direct current obtained in step S01 with a preset standard current, and determine whether the vehicle enters the no-induction-board area.
7. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for detecting a sensorless zone of a linear motor traction system vehicle according to any one of claims 1 to 3.
8. A computer arrangement comprising a memory and a processor, the memory having stored thereon a computer program, characterized in that the computer program, when being executed by the processor, executes the steps of the method for detecting a sensorless zone of a linear motor traction system vehicle according to any one of claims 1 to 3.
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| CN201911134070.5A CN112904431B (en) | 2019-11-19 | 2019-11-19 | Method, device and system for detecting non-induction plate area of vehicle of linear motor traction system and medium |
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| CN201911134070.5A CN112904431B (en) | 2019-11-19 | 2019-11-19 | Method, device and system for detecting non-induction plate area of vehicle of linear motor traction system and medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113200076A (en) * | 2021-06-09 | 2021-08-03 | 中车株洲电力机车有限公司 | Method and system for monitoring falling of induction plate of maglev train |
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| CN1990299A (en) * | 2005-12-30 | 2007-07-04 | 中国科学院电工研究所 | Linear induction motor traction carrying device |
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| CN113200076A (en) * | 2021-06-09 | 2021-08-03 | 中车株洲电力机车有限公司 | Method and system for monitoring falling of induction plate of maglev train |
| CN113200076B (en) * | 2021-06-09 | 2022-12-09 | 中车株洲电力机车有限公司 | Maglev train induction plate falling monitoring method and system |
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